package com.konoha.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.konoha.constants.SystemConstants;
import com.konoha.domain.ResponseResult;
import com.konoha.domain.dto.AddArticleDto;
import com.konoha.domain.entity.Article;
import com.konoha.domain.entity.ArticleTag;
import com.konoha.domain.entity.Category;
import com.konoha.domain.vo.ArticleDetailVo;
import com.konoha.domain.vo.ArticleListVo;
import com.konoha.domain.vo.HotArticleVo;
import com.konoha.domain.vo.PageVo;
import com.konoha.mapper.ArticleMapper;
import com.konoha.service.ArticleService;

import com.konoha.service.ArticleTagService;
import com.konoha.service.CategoryService;
import com.konoha.utils.BeanCopyUtils;
import com.konoha.utils.RedisCache;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

@Service
public class ArticleServiceImpl extends ServiceImpl<ArticleMapper, Article>implements ArticleService {

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisCache redisCache;

    @Autowired
    private ArticleTagService articleTagService;

    @Override
    public ResponseResult hotArticleList() {
        //查询热门文章 封装成ResponseResult返回
        LambdaQueryWrapper<Article> queryWrapper = new LambdaQueryWrapper<>();
        //必须是正式文章
        queryWrapper.eq(Article::getStatus, SystemConstants.ARTICLE_STATUS_NORMAL);
        //按照流量进行排序
        queryWrapper.orderByDesc(Article::getViewCount);
        //最多只查询10条
        Page<Article> page = new Page(1,10);
        page(page,queryWrapper);

        List<Article> articles = page.getRecords();
        //bean拷贝
//        List <HotArticleVo> articleVos = new ArrayList<>();
//        for (Article article : articles) {
//            HotArticleVo vo =new HotArticleVo();
//            BeanUtils.copyProperties(article, vo);
//            articleVos.add(vo);
//        }
        List<HotArticleVo> vs = BeanCopyUtils.copyBeanList(articles, HotArticleVo.class);


        //用静态方法返回
        return ResponseResult.okResult(vs);

    }

    @Override
    public ResponseResult articleList(Integer pageNum, Integer pageSize, Long categoryId) {
        //查询条件
        LambdaQueryWrapper<Article> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        //如果有categoryId就要查询时要和传入的相同
        lambdaQueryWrapper.eq(Objects.nonNull(categoryId)&&categoryId>0 ,Article::getCategoryId, categoryId);
        //状态是正式发布的
        lambdaQueryWrapper.eq(Article::getStatus, SystemConstants.ARTICLE_STATUS_NORMAL);
        //对isTop进行排序
        lambdaQueryWrapper.orderByDesc(Article::getIsTop);
        //分页查询
        Page<Article> page = new Page<>(pageNum, pageSize);
        page(page, lambdaQueryWrapper);

        //查询categoryName
        List<Article> articles = page.getRecords();
        //stream流查询
        //获取分类id查询分类信息，获取分类名称
        //把分类名称设置给article
       articles.stream()
                .map(article ->article.setCategoryName(categoryService.getById(article.getCategoryId()).getName()))
                .collect(Collectors.toList());

        //articles查询articleName进行设置
//        for (Article article : articles) {
//            Category category = categoryService.getById(article.getCategoryId());
//            article.setCategoryName(category.getName());
//        }

        //封装查询结果
        List<ArticleListVo> articleListVos = BeanCopyUtils.copyBeanList(page.getRecords(), ArticleListVo.class);



        PageVo pageVo = new PageVo(articleListVos, page.getTotal());
        return ResponseResult.okResult(pageVo);
    }

    @Override
    public ResponseResult getArticleDetail(Long id) {
        //根据id查询文章
        Article article = getById(id);

        //从redis中获取viewCount
        Integer viewCount = redisCache.getCacheMapValue(SystemConstants.ARTICLE_VIEW, id.toString());
        article.setViewCount(viewCount.longValue());

        //转换成VO
        ArticleDetailVo articleDetailVo = BeanCopyUtils.copyBean(article, ArticleDetailVo.class);
        //根据分类id查询分类名
        Long categoryId = articleDetailVo.getCategoryId();
        Category category = categoryService.getById(categoryId);
        if (category!=null){
            articleDetailVo.setCategoryName(category.getName());
        }
        //封装响应返回
        return ResponseResult.okResult(articleDetailVo);
    }

    @Override
    public ResponseResult updateViewCount(Long id) {
        //更新redis中对应id的浏览量
        redisCache.incrementCacheMapValue(SystemConstants.ARTICLE_VIEW,id.toString(),1);
        return ResponseResult.okResult();
    }

    @Override
    public ResponseResult add(AddArticleDto articleDto) {
        //添加 博客
        Article article = BeanCopyUtils.copyBean(articleDto, Article.class);
        save(article);
        List<ArticleTag> articleTags = articleDto.getTags().stream()
                .map(tagId -> new ArticleTag(article.getId(), tagId))
                .collect(Collectors.toList());
        //添加 博客和标签的关联
        articleTagService.saveBatch(articleTags);
        return ResponseResult.okResult();
    }
}
